Nonlinear Second-Order Actuator

R2026b

Implement second-order actuator with rate and deflection limits

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  • Nonlinear Second-Order Actuator block

Libraries:
Aerospace Blockset / Actuators

Description

The Second Order Nonlinear Actuator block outputs the actual actuator position using the input demanded actuator position and other dialog box parameters that define the system.

Examples

Lightweight Airplane Design

Lightweight Airplane Design

Address the technical and process challenges of aircraft design using the design of a lightweight aircraft.

HL-20 with Flight Instrument Blocks and Visualization Using Unreal Engine

HL-20 with Flight Instrument Blocks and Visualization Using Unreal Engine

Model NASA HL-20 lifting body and controller modeled in Simulink® and Aerospace Blockset™, using Unreal Engine® for visualization.

Ports

Input

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Demanded actuator position, specified as a scalar or array.

Data Types: double

Output

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Actual actuator position, returned as a scalar or array.

Data Types: double

Parameters

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Natural frequency of actuator, specified as a scalar double, in radians per second.

Programmatic Use

Block Parameter: wn_fin
Type: character vector
Values: scalar | double
Default: '1'

Damping ratio of actuator, specified as a scalar double.

Programmatic Use

Block Parameter: z_fin
Type: character vector
Values: scalar | double
Default: '0.3'

Largest actuator position allowable, specified as a scalar double, in the same units as demanded actuator position.

Programmatic Use

Block Parameter: fin_max
Type: character vector
Values: scalar | double
Default: '20*pi/180'

Smallest actuator position allowable, specified as a scalar double, in the same units as demanded actuator position.

Programmatic Use

Block Parameter: fin_min
Type: character vector
Values: scalar | double
Default: '-20*pi/180'

Fastest speed allowable for actuator motion, specified as a scalar double, in the units of demanded actuator position per second.

Programmatic Use

Block Parameter: fin_maxrate
Type: character vector
Values: scalar | double
Default: '500*pi/180'

Initial position of actuator, specified as a scalar double, in the same units as demanded actuator position.

  • If the specified value is less than the value of Minimum deflection, the block sets the value of Minimum deflection as the initial position value.

  • If the specified value is greater than the value of Maximum deflection, the block sets the value of Maximum deflection as the initial position value.

Programmatic Use

Block Parameter: fin_act_0
Type: character vector
Values: scalar | double
Default: '0'

Initial velocity of actuator, specified as a scalar double, in the units of demanded actuator position per second.

If the absolute value of the specified value is greater than the absolute value of Rate Limit, this block sets the value of Rate Limit as the initial velocity value.

Programmatic Use

Block Parameter: fin_act_vel
Type: character vector
Values: scalar | double
Default: '0'

Extended Capabilities

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C/C++ Code Generation
Generate C and C++ code using Simulink® Coder™.

Version History

Introduced in R2012a

See Also

Topics